Shaper dust hood



July 22, 1952 F. 1. JOHNSON 2,604,129

SHAPER DUST HOOD Filed Jan. 27, 1949 2 SHEETS-Smm 1 Maffay/4.

July 22, 1952 l F. l. JOHNSON 2,604,129

SHAPER DUST HOOD Filed Jan. 27, 1949 v 2 SHEETS-SHEET INVENTOR. Fred f.-.JO/7275072.

of' Figure'V 1 Patented July 22, 1952 UNITE-o f l i Y SHArEi-noon-' l I.l l u y A Y Fred: I... Johnson. Sheboygan, Wis., assignor to ReissManufacturing Corporation, Wilmington, Del.,.a .corporation-' ofDeIaware ApplicatonJanuary 27", 1945),.Serial'1Noz.73,202

f ters.

object off this invention isf toprovide a: dust collecting hood of. thetype described which/will catch the shav-ingsL thrown off` by this Vtypeof machineryat the source before they have a chance'to become scatteredand'- interfere with the-cuttingl or shaping operation-being"carriedout.

Furthermore,- itis-animportant objectA that the hoodopeningi be small?enoughto cooper-ate auto-4 matically-v with the contour of'the-workpieceV in such-away thata high efficiencyv ofi suctionvpickupmay be obtained.

It is afurther object ofthis'Y invention` to provide aI dust' collectinghoodA off a simple 'andrem-` pactdesign which maybe easily adjusted andadapted to the various autom-atic- 4Shaper-sf employed in thewoodworking industry Still further objects of this invention will-becomeapparent from the detailed description.

given hereafter in connection with the attached drawings, in which:

Figure-1- isa topA plan view-of the-dustfhood; Figure 2 is a sideelevation-ai viewofthe: hood Figure 3 is a fragmental' detailed viewtaken along the line 3'3 of Figure 2-, and' Figure 4 is a perspectiveview of' an' automatic Shaper with the improved' hood in its assembledrelationship.

In order to more completely describe. applicants improved dustcollecting, hood', reference will now be haditoFigures l through 3,inclusive,

in the drawings, wherein the dust collecting hood comprises an enclosuregenerally designatedas Il 1 having atop Il, a bottom l2, ends. I4' and'l5,

anda rear I8, Whichare preferably made of sheet vmetal. Top andA bottom.Il and I2, respectively,

are. identical in, shape. and. have a substantially U.shaped recess I3formedin the front edge of" an. opening inV each. of theendwalls. Walll-.is'vr relents, (c1, 14a-'2.52).

curvedto tthe contour of; therear sideavl. of

topand bottom plates Il and |2- andforms` the supportingmean's; for thetop-and'l bottom plates alongwith-.end Wall;membersl l4-an'd |5 onthreev sides:4 Thefront side-*20 of. the hoodis.-.open for the' purposehereinafter-described; l

Adjustable hood gate 2lV forms parteiy the-front edge of the side walll5 and is-fastened thereto by means: of hinge: 22- and a hinge fasteningmeans such -asrmetalscrews` Inorder: that, the

' hoodgates` length may be adjusted,.it. ism-ade of two relativelyadjustable. rectangularmembers- 24 and 25.. Two parallel slits126 areprovided in member 25 `for the. purpose-.or this adjustable feature andby the. means of. two. adjustable yscrewsj 21 cooperating in slits andreceived by member 24, the length. oi the-:hood gata-.may

^ be extend'edorretracted as desired; Twozarcirate Z5 of- 1eather,rubberorother Suitable material, is

'spring'members 28; fastened on the-inside offend wallf I5, in theposition shown, by screws. 29, ract as' a sto-p to prevent the hood gatefrom swinging inwardly into the hood beyond avdesiredadij-ustable limit.l

A rectangulanshaped' ilex-ibletongue 30, made Iixed along one of itslongersides to the entire length of the fron-ty edge of end wall |14by'any suitable fastening means such as metal screws and' washers 3l.

A vpivot post 32 isV fixed perpendicularly to the underside of bottomplate l2., asshownibymeans of. nut 33 onyal reduced screw threadedrendi-3l!- of one, end of the post', which isreceived by hole r3'5. Theother end 36 of thepost isia reduced'end thus` providing a stop shoulder31; forA pivotally supporting the. hood I0. n

At a point on the front` oithebaselZ, near the point at..` which sideWjallllll is -xed'gto base. I.2i as shown in. Figure 2,. iixed a. hood.-talus-up,y support. generally designated-as. 39.. member consists. of`a. flat plate. mounting means 40, fixed to the bottom of' basel-L by.meansofscrewsll, a vhood takefuppivot post` 4-2 i-iixed. vertically tothe.. bottom of. themounting means 4U', a cylindrical. take-up.roller.43 received-'byan..opening therein by the pivotpost. 42,. asealedroller bearing. .44. receivedbythe pivot. post fand...1totatablysupporting. roller 43 arod 4.5 vrotatably received by meansof aneye 4-6onpostAZ belowv the bearing 44, and. atake-up slidecap, 41, fixed to theend of post 4Z and holding members 45). M and 43 irlassembledrelationship...

An angle. bracket.. member 4:8, having a. hole through its verticalportion. lliitsonftcijmdl 45 "ing the hood vabout the pivot'post 32.

icontour of the work changes, the take-up roller of the angle bracket 48are two holes for receiving bolts 5I by which thebracket is xed to thehood supporting surface described hereinafter. About yrod 45 is thecoiled tension spring 52 having one end xed in notch 53 in the verticalportion 49 of bracket 48 and the other end fixed to the end 54 of rod 45by means' of two nuts 55 and 56 screw threaded on end y54.

A sash stop chain 5'I is fixed at end 58 to the wall I8 and is receivedas desired along. its length by notch 59 in the vertical portion 49 ofbracket 48;

Av follower cleaner 60, preferably m'ade `of spring metal and havingfelt pads BI fixed at one end, is positioned within the hood ID as shownin Figure 1 by the fastening means 62.

In Figure 4, the hood I is shown in its assembled relationship with anautomatic shaper generally designated as 63. This automatic Vshaperutilizes *af climb cut principle which is lcommonY in the millingmachine art, the stockV 64 being-held in jigs 'which are driven past thecutterV spindle 65 at'a constant rate of feed by means of a sprocket onthe cutter head spindle which engages a chain on the lower part of theform. The forms are ordinarily four-sided and clamp a piece of stocksuch as a chair leg in four different positions so that all four sidesof the-piece may be machined. The form or jig carrying the stock is heldin engagement with Vthe cutter head andthe drive sprocket by means of anair cylinder, generally designated as 66, Whichforces the workpieceforward. It is, of course, to be understood that the particularautomatic shaper 63, the full details of which are not shown since itforms no part Vof this inven- "tion, is 'shown for purposes ofillustrating the This hood may be, however,

uses of hood III. utilized with many other types of woodworkingmachines, such as routers, hand shapers, etc., and it is not limited inits use to the particular Whitney automatic Shaper shown.

The pivot post 32 of hood I0 is positioned in a hole provided verticallyin the shaper table 61 at a position such that the U-shaped recesses I3of the top and bottom plates closely nt about the rear half of thespindle 65 in such a position as to receive the shavings or dust thrownoff by the cutter without allowing them to be scattered about` and, atthe same time, without permitting the loss of efliciency in the airsuction pick-up which is provided by a suitable exhaust .pump connectedto the Y-connecter 68 which,

' is held in position by means of bracket '48 xed to top IiI` by meansof bolts 5|.

It is seen that the spring 52 urges end I4 of the hood I0 towards the`workpiece 64 by pivot- As the 43, urged `by spring 52, follows thischange in contour'and, therefore,` holds the end I4 of the hood asvclose as possible to the workpiece. Flexible tongue 30 is provided inorder to form a close seal with the workpiece and, at the same time, toprevent the workpiece from being scarred or otherwisejinjured by thehood as the wood passes across the cutter spindle.

Adjustable hood gate 2I may have its length extended in order toproperlyvreceive the trailing edge of the workpiece without the loss ofthe emciency of the air suction system. In the case of thin stock, suchas table tops, which may extend a considerable distance beyond the edgeof the form before passing by the cutter head,

. this sliding'plate 25 canbe'notched so that the stock may pass throughit. This does not materially affect the ei'liciency of the dust hood.

` A safety sash chain 5l is provided, as pointed out supra, in order toprovide a limit beyond which the hood end I4 cannot be urged pivotallyabout pivot post 32. This, of course, prevents the hood from jammingwith the spindle 65 after the workpiece has been fed completely by thecutter.

The follower cleaner 60 described above is for the purpose ofcontinuously cleaning a guide collar located on the cutter spindle,against which the wooden form or jig presses as it is driven past thecutter spindle. Y

From the foregoing description of the improved hood and the method ofassembling it with relation to a woodworking machine, it is readily seenthat applicants type of hood has overcomethe difficulties encounteredwhen employing the usual large canopy type hood. Applicants particularhood is not only small and compact in design, but also Oilers animproved means for picking up the shavings at their source and, at thesame time, requires a less expensive type exhaust system for removingthe shavings to an out of the Way discarding position, since it providesan eifective sealing means about the cutter and between the cutter andthe workpiece being fed across the spindle thus presenting a minimumclearance for the escape of .shavings Furthermore, the hood is positivein action and follows the contour of a workpiece exactly, withoutoffering mechanical difculties, such as jamming encountered in the typeof hoods previously used in the art.

VIt is to be understood that the hood may be modified, if desired, byhinging it at the center and making one side rigid, or by hinging it inthe center and providing each end of the hood with a spring urged hoodtake-up support, ror by a combination of other pivoted means which wouldemploy the basic idea incorporated in applicants new and novel hood.

The terminology used in the` specification is for the purpose ofdescription and not for limitation;l the scope of the invention beingdefined in the claims.

I claim:

1. An improved dust collecting device comprising a hood enclosure havingtop, bottom, rear .and end plates, an air exhaust duct connected to atleast one of said end plates, aligned U-shaped recesses formed in thefront edges of the tcp and bottom plates, a pivot post and a hoodtake-up support means, each ixed tothe underside of the bottom plate andeach located on opposite sides of the saidU-shaped recess,v said hoodtake-up support being adapted to move said hood enclosure about the axisof said pivot post.

2. An improved dust collecting 'device compris- `ing aV hood having topland bottom plates',A vthe xed to the bottom plate at the other side ofthe U-shaped recess, said hood take-up support being adapted to movesaid hood enclosure about the axis of said pivot post, said hood take-upincluding a rodvflxed rotatably at one end of said takeup support, saidrod having a supporting bracket sldably held thereon and a coil springsurrounding said rod, one end of said spring being fixed to said bracketand the other end being iixed to the other end of the said rod.

3. An improved dust collecting hood, as set forth in claim 1, whereinthe end plate adjacent the fixed pivot post is provided with a hingedadjustable gate.

4. An improvedv dust collecting device, as set forth in claim 1, whereina rectangular flexible tongue is fixed along the leading edge of the endplate which is adjacent the hood take-up support.

`5. An improved dust collecting device, as set forth in claim 1, whereina follower cleaner is provided within the hood and is supported by theblack plate.

6. An improved dust collecting device comprising a hood-having top andbottom plates, the front edge of each having U-shaped recesses formedtherein, two end wall plates, at least one of which has an air exhaustduct connected thereto and a back wall plate, each positioning the topand bottom plates in spaced parallel relationship, said hoodbeing openat the front side, a first pivot post xed to the underside of the bottomplate and to one sideA of the U-shaped recess, and a second pivot postfixed at one end on the underside of said bottom plate and at the otherside of the said recess, said second post which consists of a dustcollecting hood having top, bottom and rear walls, ends open at thefront, U-shaped recesses formed in the front edges of the top and bottomwalls and adapted to partially p enclose the vertical spindle, said hoodbeing provided with a pivot post fixed to the underside of said bottomand to one side of said U-shaped recess, means in said table forreceiving said pivot post, and means for slidably supporting said hoodYat a position on the other side of said last-named U-shaped recess.

FRED I. JOHNSON.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 587,370 Middleton Aug. 3, 1897799,641 Fox Sept. 19, 1905 1,079,032 Solern NOV. 18, 1913 1,109,186rSolem Sept. 1, 1914

